D - Textiles – Paper – 21 – H
Patent
D - Textiles, Paper
21
H
D21H 19/38 (2006.01) B41M 3/14 (2006.01) C09D 5/22 (2006.01) D21H 19/40 (2006.01)
Patent
CA 2337027
The invention relates to a spreadable paint containing a pigment mixture, an adhesive as well as water and known coating aids, wherein the pigment mixture is composed of precipitated silicic acid with a specific surface area of 600 m2/g to 700 m2/g and an absorber pigment which absorbs excitation radiation from the ultraviolet or visible region of the spectrum; and relates further to a coated paper (1) coated with a coat made from one of these spreadable paints, whose paper carrier (2) contains a paper dye which emits fluorescence as a result of being irradiated with an excitation radiation, which itself is at least partially absorbed by an absorber pigment of the coating. The coating (3) according to the invention preferably absorbs UV light and has the characteristic that large areas detach from the paper carrier (2) due to mechanical tampering attempts such as scratching or erasure so that forged forms are rendered recognizable with the help of, for example, optical whiteners in the paper carrier (2).
L'invention concerne une peinture pouvant être étalée, contenant un mélange de pigments, un adhésif ainsi que de l'eau et des agents d'application connus. Le mélange de pigments se compose d'acide silicique précipité avec une surface efficace spécifique comprise entre 600m2/g et 700 m2/g et un pigment absorbant qui absorbe les rayonnements d'excitation à partir de l'ultraviolet ou de la zone visible du spectre. L'invention a aussi pour objet un papier recouvert (1) d'une couche d'une de ces peintures pouvant être étalées. Le support (2) de papier contient un colorant de papier qui émet une fluorescence lors de son exposition à un rayonnement d'excitation qui est lui-même, au moins partiellement, absorbé par un pigment absorbant du revêtement. Le revêtement (3) selon l'invention absorbe, de préférence, la lumière U.V. et se caractérise en ce que de grandes zones se détachent du support (2) lors de tentatives d'altérations mécaniques frauduleuses telles que des rayures ou un effacement. Ce système permet de reconnaître les contrefaçons à l'aide, par exemple, d'agents blanchissants optiques dans le support (2) de papier.
Mccarthy Tetrault Llp
Security Transfer B.v.
Wilcke Michael
LandOfFree
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